← Properties of selected organic compounds

The reaction web + tests (every paper)

Alkene hub; alcohol oxidation; tests = observation + conclusion.

Core web

alkene H₂ / Ni ⟶ addition alkane alkene HBr ⟶ Markovnikov haloalkane alkene H₂O / H⁺ ⟶ heat alcohol haloalkane NaOH(aq) ⟶ substitution alcohol haloalkane KOH/ethanol ⟶ elimination alkene 1° alcohol dichromate ⟶ distil aldehyde 1° alcohol excess dichromate ⟶ reflux acid 2° alcohol dichromate ⟶ reflux ketone

Test	Observation → conclusion
Br₂(aq)	Decolourises → C=C present
K₂Cr₂O₇/H⁺ warm	Orange→green → 1°/2° alcohol or aldehyde; stays orange → 3°/ketone/acid
Na₂CO₃	Fizzing CO₂ → carboxylic acid

Markers want BOTH sides: observation for each compound AND which compound it identifies.

Practice for this standard covers the whole topic — flashcards and quiz.